For ternary compositions of apatite similar to those measured in KREEP basalts 72275 and 15386, with relatively low water contents, a D H 2 O apatite/melt value of ∼0.05 is most appropriate. For apatites in meteorite NWA 773, water contents are slightly higher, and Vander Kaaden et al. (2012) indicated that a D H 2 O apatite/melt value of ∼ ...

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（Apatite）,,,。 Ca5(PO4)3(F,Cl,OH),（PO4）3- …

1. Introduction. Apatite is one of the most common accessory minerals in granitoids, and hosts halogens, rare-earth elements (REEs), Sr, Y, Th, and U, which are all sensitive to the evolution of melt and fluids (Bruand et al., 2017).Thus, apatite geochemistry has been widely used, not only for understanding ore genesis (Treloar and Colley, 1996) …

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Apatite in fresh rocks has a higher Cl and Mn content, and lower Fe, Mg, Sr, Pb, and calculated X OH-apatite, compared to apatite in altered rocks. The content of F, rare earth elements (REEs), Y, U, Th, and Zr, and the Sr-Nd isotope signatures of apatite from fresh and altered rocks are similar in all apatite grains ( 87 Sr/ 86 Sr = …

Apatite is the generic name, which was first introduced by German geologist A.G. Werner. These minerals and their synthetic analogs represent a major …

"Apatite" is a field term for unidentified calcium phosphate members of the apatite group. Most "apatite" is fluorapatite, whereas hydroxylapatite is much less common and chlorapatite is very rare. "Apatite" crystals are short to long hexagonal prisms [0001], with {10 1 0} and {10 1 1} dominant; also thick tabular {0001}, frequently in the crystals of hydrothermal …

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De plus, elle accroît le sens de l'écoute. L'apatite verte est en revanche la pierre du bien-être. Elle peut optimiser votre motivation, ce qui vous permettra de remplir vos fonctions avec efficacité et en toute sérénité. …

Physical Properties. Apatite is best known for its use as an index mineral with a hardness of 5 in the Mohs Hardness Scale. It is usually green in color, but can be yellow, brown, blue, purple, pink, or colorless. These colors …

Apatite –mica glass-ceramics were developed as an alternative to the AW system by Vogel and coworkers. Mica glass-ceramics based on tetrasilicic micas and trisilicic mica phases …

（apatite） X5[ZO4]3（F,Cl,OH)。XCa,Sr,Ba,Pb,Na,Ce,Y；ZP,As,V,Si。 …

The extreme volatile-element depletion of lunar rocks led to early estimates of less than 1 part per billion (ppb) H in the bulk Moon (); however, direct measurements of lunar apatite and olivine-hosted melt inclusions indicated terrestrial levels of hydrogen (2–5).H-rich apatites [with abundances exceeding hundreds or even thousands of parts …

Chlorine is a redox-sensitive and fluid-mobile element, and is involved in many geological processes. Apatite, a ubiquitous accessory mineral in mafic to felsic rocks, is the most-studied mineral in chlorine isotope research due to its abundant structural chlorine [Ca 5 (PO 4) 3 (F, Cl, OH)]. Although a wide δ 37 Cl range (up to 40‰) has been …

Apatite is a common resistate mineral occurring in a range of host rocks and ore-related hydrothermal alteration assemblages. Apatite in several porphyry copper deposits in British Columbia has a unique set of physical and compositional characteristics that can be used to evaluate the chemical conditions of magmas that formed the …

Apatite geochemical and Sr Nd isotopic compositions provide robust means for constraining a wide range of geological processes in earth and planetary sciences, including magmatism, metamorphism, metasomatism, planetary geochemistry, and geochronology. Here we extend the utility of these data to fingerprint magmatic …

apatite a.pa.tit féminin. (Minéralogie) Nom générique désignant des phosphates de calcium hexagonaux de composition assez variable. …: d'autre part l'agrégation naturelle de cristaux d'apatite, susceptibles de constituer peu à peu une sorte d'antenne radio (de manière à augmenter ses capacités émettrices-réceptrices).

Apatite –mica glass-ceramics were developed as an alternative to the AW system by Vogel and coworkers. Mica glass-ceramics based on tetrasilicic micas and trisilicic mica phases are the basis of commercial machinable glass-ceramics for industrial and dental applications. The incorporation of a mica phase is designed to impart machinability to ...

In some cases the treatment of an apatite by a metallic salt, in aqueous solution, does not result in the substitution of Ca 2+ by another metallic cation unlike what was suggested in examples, with La 3+ or Ru 3+ [17], [18].Actually, in many cases, the cation sorption occurs by partial apatite's dissolution in the aqueous medium and …

Apatite geochemical and Sr Nd isotopic compositions provide robust means for constraining a wide range of geological processes in earth and planetary sciences, including magmatism, metamorphism, metasomatism, planetary geochemistry, and …

The Apatite crystal contains the same elements that make up our tooth enamel, making it an excellent healing aide for dental issues and mending broken bones. Crystals might seem like the most stable and sedentary objects on earth yet they are associated with ethereal, otherworldly realms.

Apatite in fresh rocks has a higher Cl and Mn content, and lower Fe, Mg, Sr, Pb, and calculated X OH-apatite, compared to apatite in altered rocks. The content of …

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